Having done some minor previous electrical work on vehicles and having an EE degree was helpful in this endeavor. This unit is more geared towards professional installers, which I am not. However, using resources available on the web such as the12volt.com and bulldog.com will allow you to struggle through the installation. I installed this on a 2002 Ford Taurus. The installation of the basic start and unlock functions were not too difficult, but time consuming, requiring the connecting of quiet a few wires, two of which were in the engine compartment (tach and hood release). Cleanly running wires from the interior through the firewall took some effort. Enabling some more advanced functions such as the trunk release and dome lights to come on when the unlock is done was a little more involved, requiring additional relays and diodes to protect the 200ma current max provided by the aux outputs. The relay was needed for the trunk release since the existing car button engaged the solenoid directly, which would fry the aux output. The "dome supervision" signal was difficult to access in this particular vehicle so I instead diode isolated (from each other) the door trigger and unlock signal and added a relay to pull these signals down when the unlock signal from the unit was sent. This allowed the activation of the interior lights when the unlock button on the remove was pressed. I Still have an aux2 output that I have not taken advantage of and could potentially use it to control something else.